LM4890MSLASHNOPB datasheet(6/36 Pages) TI

6 / 36 page

LM4890

SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013

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Electrical Characteristics VDD = 3V

(1)(2)(3) (continued)

The following specifications apply for the circuit shown in Figure 7 unless otherwise specified. Limits apply for TA = 25°C.

LM4890

Units

Parameter

Test Conditions

(Limits)

Typical(4)

Limit(5) (6)

VOS

Output Offset Voltage

mV (max)

ROUT-GND

Resistor Output to Gnd(7)

9.7

Ω (max)

8.5

7.0

Ω (min)

TWU

Wake-up time

120

180

ms (max)

Output Power (8

Ω)

THD = 1% (max); f = 1kHz

0.31

0.28

TSD

Thermal Shutdown Temperature

150

°C(min)

170

190

°C(max)

THD+N

Total Harmonic Distortion + Noise

Po = 0.15Wrms; f = 1kHz

0.1

PSRR

Power Supply Rejection Ratio(8)

Vripple = 200mV sine p-p

56 (f = 217Hz)

dB(min)

Input terminated with 10 ohms to

62 (f = 1kHz)

ground

(7)

ROUT is measured from each of the output pins to ground. This value represents the parallel combination of the 10k ohm output

resistors and the two 20k ohm resistors.

(8)

PSRR is a function of system gain. Specifications apply to the circuit in Figure 7 where AV = 2. Higher system gains will reduce PSRR

value by the amount of gain increase. A system gain of 10 represents a gain increase of 14dB. PSRR will be reduced by 14dB and

applies to all operating voltages.

Electrical Characteristics VDD = 2.6V

(1) (2) (3)

The following specifications apply for for the circuit shown in Figure 7 unless otherwise specified. Limits apply for TA = 25°C.

LM4890

Units

Parameter

Test Conditions

(Limits)

Typical(4)

Limit(5) (6)

IDD

Quiescent Power Supply Current

VIN = 0V, Io = 0A, No Load

2.6

mA (max)

ISD

Shutdown Current

VSHUTDOWN = 0V

0.1

µA (max)

Output Power (8

Ω)

THD = 1% (max); f = 1 kHz

0.2

Output Power (4

Ω)

THD = 1% (max); f = 1 kHz

0.22

THD+N

Total Harmonic Distortion + Noise

Po = 0.1Wrms; f = 1kHz

0.08

PSRR

Power Supply Rejection Ratio(7)

Vripple = 200mV sine p-p

44 (f = 217Hz)

Input Terminated with 10 ohms to

44 (f = 1kHz)

ground

(1)

All voltages are measured with respect to the ground pin, unless otherwise specified.

(2)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical

specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the

Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication

of device performance.

(3)

For DSBGA only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a

maximum of 2µA.

(4)

Typicals are measured at 25°C and represent the parametric norm.

(5)

Limits are specified to TI's AOQL (Average Outgoing Quality Level).

(6)

Datasheet min/max specification limits are specified by design, test, or statistical analysis.

(7)

PSRR is a function of system gain. Specifications apply to the circuit in Figure 7 where AV = 2. Higher system gains will reduce PSRR

value by the amount of gain increase. A system gain of 10 represents a gain increase of 14dB. PSRR will be reduced by 14dB and

applies to all operating voltages.

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